I understand where you're coming from. If someone does want to donate to a charity, make sure you do it as anonymously as possible! Never provide any kind of legitimate contact information or they will hound you like a swarm of mosquitoes.
I ran into this problem with Habitat for Humanity. Before Caller ID and when answering machines recorded on tape, a caller would call every day at about the same time and hang up at a point where my answering machine would run the tape to the end with nothing on it, preventing any legitimate callers from leaving a message. One day I was home from work early and at the time of the mystery calls the phone rang - it was Habitat for Humanity who I had donated to just a couple of weeks earlier. I made it clear that their calls were unwelcome, and lo and behold the "mystery calls" stopped.
NEVER give any charity your contact information! They will hound you day in and day out!
SCAMMERS- DO NOT GIVE OUT ANY PERSONAL INFORMATION TO THESE SCAMMERS- IF THEY CALL AND YOU PICK UP THE PHONE, JUST SIT THE RECEIVER DOWN AND AFTER 30 SECONDS OR SO THEY WILL HANG UP- DO THIS A FEW TIMES AND THEY WILL STOP CALLING !! THEY USE DIFFERENT NUMBERS WIYH DIFFERENT AREA CODES- AGAIN , DON'T GIVE THESE A@SHOLES ANY INFORMATION !!!!! NOW YOU KNOW!!!
They called at 8:17 am. It was the American Cancer asking for me to mail envelopes to all my neighbors. When I said - Do you know what time it is and I am on the Do Not Call List. The gentlemens reply was we are a Non Profit Organization and we can call you at this time in the morning. Well I said you have been calling for weeks and I finally caught you on the phone. Take my name off your list and never call here again. And If the American Cancer Instutite is reading this - You will never get people to give money if you keep harrassing people at that time of the day and try letting the people pick up the phone. This number has been calling my house for months only it rings twice and if you don't pick it up by the second ring they hang up. SHAME ON YOU - AIRC (AKA AMERICAN INSTUTITE RESEARCH CENTER) FOR THIS.